Which statement is true about the execution of this command?

Your multitenant container database (CDB) cdb1 that is running in archivelog mode
contains two pluggable databases (PDBs), pdb2_1 and pdb2_2. RMAN is connected to the
target database pdb2_1. Examine the command executed to back up pdb2_1: RMAN>
BACKUP DATABASE PLUS ARCHIVELOG; Which statement is true about the execution of
this command?

A.
It fails because archive log files cannot be backed up using a connection to a PDB.

B.
It succeeds but only the data files belonging to the pdb2_i pluggable database are
backed up.

C.
It succeeds and all data files belonging to PD32_i are backed up along with the archive
log files.

D.
It fails because the pluggable clause is missing.